A build-it-yourself, working, fluid-powered, hydraulic arm;hand/eye coordination, visual perception, and critical thinking;Grips, lifts, and rotates. Made from natural, untreated wood from sutainable forests.;Easy to assemble in under two hours. All you need is inside - all pieces are pre-cut and ready to go

• Hydraulic Robotic Arm

Hydraulic Robotic ArmMarbles The Brain Store